WO2012039448A1 - 不斉補助基 - Google Patents
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- WO2012039448A1 WO2012039448A1 PCT/JP2011/071559 JP2011071559W WO2012039448A1 WO 2012039448 A1 WO2012039448 A1 WO 2012039448A1 JP 2011071559 W JP2011071559 W JP 2011071559W WO 2012039448 A1 WO2012039448 A1 WO 2012039448A1
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- 0 C*(*)=C1N*C(**)[C@]1OC Chemical compound C*(*)=C1N*C(**)[C@]1OC 0.000 description 2
- OSZMNJRKIPAVOS-OAHLLOKOSA-N C([C@@H]1c2ccccc2)NCc2c1cccc2 Chemical compound C([C@@H]1c2ccccc2)NCc2c1cccc2 OSZMNJRKIPAVOS-OAHLLOKOSA-N 0.000 description 1
- OFFVWTYDALUKOC-KFJBMODSSA-N CC1C=CC([C@]2(CNCCC2)O)=CC1 Chemical compound CC1C=CC([C@]2(CNCCC2)O)=CC1 OFFVWTYDALUKOC-KFJBMODSSA-N 0.000 description 1
- BIROJEPKFSFHEY-MRVPVSSYSA-N CO[C@]1(CNCCC1)C=C Chemical compound CO[C@]1(CNCCC1)C=C BIROJEPKFSFHEY-MRVPVSSYSA-N 0.000 description 1
- DATJETPTDKFEEF-RXMQYKEDSA-N N#C[C@@H]1CNCC1 Chemical compound N#C[C@@H]1CNCC1 DATJETPTDKFEEF-RXMQYKEDSA-N 0.000 description 1
- SOIZBCZOBJUNFN-UHFFFAOYSA-N OC(CNC1)(c2ccccc2)c2c1cccc2 Chemical compound OC(CNC1)(c2ccccc2)c2c1cccc2 SOIZBCZOBJUNFN-UHFFFAOYSA-N 0.000 description 1
- KJBQDFYSFZZSMZ-UHFFFAOYSA-N OC1(CNCCC1)c1ccccc1 Chemical compound OC1(CNCCC1)c1ccccc1 KJBQDFYSFZZSMZ-UHFFFAOYSA-N 0.000 description 1
- OKPFEYWKOQFZAB-OAHLLOKOSA-N O[C@@]1(CNC2)c3c2cccc3-c2ccccc12 Chemical compound O[C@@]1(CNC2)c3c2cccc3-c2ccccc12 OKPFEYWKOQFZAB-OAHLLOKOSA-N 0.000 description 1
- SOIZBCZOBJUNFN-OAHLLOKOSA-N O[C@](CNC1)(c2ccccc2)c2c1cccc2 Chemical compound O[C@](CNC1)(c2ccccc2)c2c1cccc2 SOIZBCZOBJUNFN-OAHLLOKOSA-N 0.000 description 1
- OKPFEYWKOQFZAB-HNNXBMFYSA-N O[C@]1(CNC2)c3c2cccc3-c2c1cccc2 Chemical compound O[C@]1(CNC2)c3c2cccc3-c2c1cccc2 OKPFEYWKOQFZAB-HNNXBMFYSA-N 0.000 description 1
- QJCKXDFFCNBXOG-QVDQXJPCSA-N O[C@]1(CNCC1)C1C=CC=CC1 Chemical compound O[C@]1(CNCC1)C1C=CC=CC1 QJCKXDFFCNBXOG-QVDQXJPCSA-N 0.000 description 1
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- C07D207/00—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D207/04—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members
- C07D207/10—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D207/12—Oxygen or sulfur atoms
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- C07D207/00—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D207/04—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members
- C07D207/10—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D207/16—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
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- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/56—Ring systems containing three or more rings
- C07D209/58—[b]- or [c]-condensed
- C07D209/62—Naphtho [c] pyrroles; Hydrogenated naphtho [c] pyrroles
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- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
- C07D211/04—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D211/06—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members
- C07D211/36—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D211/40—Oxygen atoms
- C07D211/42—Oxygen atoms attached in position 3 or 5
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- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
- C07D211/04—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D211/06—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members
- C07D211/36—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D211/40—Oxygen atoms
- C07D211/44—Oxygen atoms attached in position 4
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- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
- C07D211/04—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D211/06—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members
- C07D211/36—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D211/60—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
- C07D211/62—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals attached in position 4
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- C07D—HETEROCYCLIC COMPOUNDS
- C07D217/00—Heterocyclic compounds containing isoquinoline or hydrogenated isoquinoline ring systems
- C07D217/22—Heterocyclic compounds containing isoquinoline or hydrogenated isoquinoline ring systems with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to carbon atoms of the nitrogen-containing ring
- C07D217/24—Oxygen atoms
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- C07D—HETEROCYCLIC COMPOUNDS
- C07D221/00—Heterocyclic compounds containing six-membered rings having one nitrogen atom as the only ring hetero atom, not provided for by groups C07D211/00 - C07D219/00
- C07D221/02—Heterocyclic compounds containing six-membered rings having one nitrogen atom as the only ring hetero atom, not provided for by groups C07D211/00 - C07D219/00 condensed with carbocyclic rings or ring systems
- C07D221/04—Ortho- or peri-condensed ring systems
- C07D221/06—Ring systems of three rings
- C07D221/10—Aza-phenanthrenes
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- C07D221/00—Heterocyclic compounds containing six-membered rings having one nitrogen atom as the only ring hetero atom, not provided for by groups C07D211/00 - C07D219/00
- C07D221/02—Heterocyclic compounds containing six-membered rings having one nitrogen atom as the only ring hetero atom, not provided for by groups C07D211/00 - C07D219/00 condensed with carbocyclic rings or ring systems
- C07D221/04—Ortho- or peri-condensed ring systems
- C07D221/18—Ring systems of four or more rings
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- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H1/00—Processes for the preparation of sugar derivatives
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- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H19/00—Compounds containing a hetero ring sharing one ring hetero atom with a saccharide radical; Nucleosides; Mononucleotides; Anhydro-derivatives thereof
- C07H19/02—Compounds containing a hetero ring sharing one ring hetero atom with a saccharide radical; Nucleosides; Mononucleotides; Anhydro-derivatives thereof sharing nitrogen
- C07H19/04—Heterocyclic radicals containing only nitrogen atoms as ring hetero atom
- C07H19/06—Pyrimidine radicals
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- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H19/00—Compounds containing a hetero ring sharing one ring hetero atom with a saccharide radical; Nucleosides; Mononucleotides; Anhydro-derivatives thereof
- C07H19/02—Compounds containing a hetero ring sharing one ring hetero atom with a saccharide radical; Nucleosides; Mononucleotides; Anhydro-derivatives thereof sharing nitrogen
- C07H19/04—Heterocyclic radicals containing only nitrogen atoms as ring hetero atom
- C07H19/16—Purine radicals
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- C07—ORGANIC CHEMISTRY
- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H21/00—Compounds containing two or more mononucleotide units having separate phosphate or polyphosphate groups linked by saccharide radicals of nucleoside groups, e.g. nucleic acids
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- C07—ORGANIC CHEMISTRY
- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H21/00—Compounds containing two or more mononucleotide units having separate phosphate or polyphosphate groups linked by saccharide radicals of nucleoside groups, e.g. nucleic acids
- C07H21/02—Compounds containing two or more mononucleotide units having separate phosphate or polyphosphate groups linked by saccharide radicals of nucleoside groups, e.g. nucleic acids with ribosyl as saccharide radical
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- C07—ORGANIC CHEMISTRY
- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H21/00—Compounds containing two or more mononucleotide units having separate phosphate or polyphosphate groups linked by saccharide radicals of nucleoside groups, e.g. nucleic acids
- C07H21/04—Compounds containing two or more mononucleotide units having separate phosphate or polyphosphate groups linked by saccharide radicals of nucleoside groups, e.g. nucleic acids with deoxyribosyl as saccharide radical
Definitions
- the present invention relates to a novel compound that can act as an auxiliary group for asymmetric induction in the production of a phosphorus atom-modified nucleic acid derivative.
- Nucleic acid derivatives such as oligonucleotides are useful for various uses such as treatment and prevention of diseases, diagnosis, and nanomaterials.
- nucleolytic enzymes for example, “Frontiers of Nucleic Acid Drugs”, Chapter 1, Development of Nucleic Acid Drugs, Chemical Creation of Phosphorus Atom-Modified Nucleic Acids, pp .67-75, written by Takeshi Wada, CMC Publishing Co., Ltd., published February 2009).
- nucleic acid derivatives that has stability against degradation by nucleolytic enzymes and retains affinity for complementary DNA / RNA sequences derived from in vivo or in vitro by controlling the stereotype at the phosphorus atom. Offer is desired.
- nucleic acid derivatives in which phosphorus atoms are modified with sulfur atoms or boron atoms, and several methods for controlling the stereostructure of phosphorus atoms in the production of such derivatives are provided.
- a compound represented by the general formula (3) is used as an activator, and via a compound represented by the general formula (13) as a reaction intermediate, A method for producing a highly regular phosphorous atom-modified nucleic acid derivative (oxazaphosphoridine method) is disclosed.
- an optically active nucleoside 3′-phosphoramidite represented by the general formula (1) is produced, and this compound is used as a starting material (monomer) together with an activator represented by the general formula (3).
- this method produces a compound represented by the general formula (13) by reacting a nucleoside and appropriately protecting it and then reacting with an electrophile to produce a compound represented by the general formula (13).
- it is unstable and difficult to apply industrially.
- asymmetric auxiliary group for asymmetric induction (hereinafter sometimes referred to as “asymmetric auxiliary group” in the present specification) in the method for producing a phosphorus atom-modified nucleic acid derivative.
- a compound represented by Formula 3 is reacted with a phosphorus atom of a nucleic acid derivative, and in Formula D4, D is Formula A (the residue of the compound of Formula 3), or represented by Formula 5
- a method for producing a phosphorus atom-modified nucleic acid derivative with high asymmetric yield by producing a compound and then removing the asymmetric auxiliary group is disclosed. The outline of this method is shown in the following scheme.
- This method using an asymmetric auxiliary group can use an achiral H-phosphonate monoester that is chemically stable and can be synthesized in large quantities as a starting material, and is isolated by forming an optically active monomer in the reaction system. This is industrially advantageous over the method described in JP-A-2005-89441 in that the condensation reaction can be performed without purification.
- the compound used for the introduction of the asymmetric auxiliary group in the above method is a compound having the following structure (a compound represented by Formula 3 in the above publication).
- W 1 and W 2 are each independently -NG 5- , -O-, or -S-, and G 1 , G 2 , G 3 , G 4 , and G 5 are each independently hydrogen Represents an atom, an alkyl group, an aralkyl group, a cycloalkyl group, a cycloalkylalkyl group, a heterocyclic group, a heteroaryl group, or an aryl group, or of G 1 , G 2 , G 3 , G 4 , and G 5 Together to form a G 6 saturated, partially unsaturated or unsaturated monocyclic, polycyclic, condensed or non-condensed hydrocarbon ring group or hetero atom containing Represents a cyclic group (however, no more than 4 of G 1 , G 2 , G 3 , G 4 ,
- An object of the present invention is to provide means for efficiently producing a phosphorus atom-modified nucleic acid derivative having high stereoregularity. More specifically, an object of the present invention is to provide an asymmetric auxiliary group useful for efficiently producing a phosphorus atom-modified nucleic acid derivative having high stereoregularity, and a compound for introducing the asymmetric auxiliary group. It is to provide.
- the inventors of the present invention conducted intensive research to solve the above-mentioned problems.
- the asymmetric auxiliary group introduced using the four types of compounds disclosed in International Publication WO 2010/064146 is chemically bonded to the phosphorus atom.
- the asymmetric auxiliary group introduced using the compounds represented by Formula Q and Formula R among the above four compounds is subjected to strong acidic conditions such as 1% trifluoroacetic acid (TFA) /
- strong acidic conditions such as 1% trifluoroacetic acid (TFA) /
- TFA trifluoroacetic acid
- this acidic condition is a condition in which elimination (deprination) of an adenine base whose base moiety is protected with an acyl-type protecting group (generally an acyl-type protecting group is introduced into the adenine base) occurs.
- an asymmetric auxiliary group using a compound represented by the following general formula (I) that is not specifically disclosed in International Publication WO 2010/064146.
- removal of the asymmetric auxiliary group is performed under milder acidic conditions, for example, by removing the 5'-end dimethoxytrityl (DMTr) group in the nucleic acid synthesis cycle, thereby extending the chain length. It can be performed by the S N 1 mechanism under the conditions of 3% dichloroacetic acid (DCA) / dichloromethane used in the process, and a long-chain nucleic acid derivative can be produced very efficiently by using this asymmetric auxiliary group. I found.
- DCA dichloroacetic acid
- the asymmetric auxiliary group introduced using the compounds represented by Formula O and Formula ⁇ P is a basic condition such as ammonia. Treatment with water at 55 ° C. for 12 hours can be eliminated as an aziridine compound.
- the removal of the asymmetric protecting group by this basic condition does not cause a problem when synthesizing relatively short DNA strands.
- the synthesis of long DNA or chemically unstable RNA strands causes chain degradation.
- Bs represents a nucleobase
- Ph represents a phenyl group
- Nu represents a nucleophile
- DMTr represents a dimethoxytrityl group
- the present inventors have introduced an asymmetric auxiliary group using a compound represented by the following general formula (XI) that is not specifically disclosed in International Publication WO 2010/064146.
- the reaction proceeds with a high asymmetric yield, and the asymmetric auxiliary group can be removed by a ⁇ -elimination mechanism under milder basic conditions, and a long-chain nucleic acid derivative can be obtained by using this asymmetric auxiliary group. It has been found that it can be produced very efficiently.
- the present invention has been completed based on these findings.
- R 1 and R 2 are each independently a hydrogen atom, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, or an alkynyl which may have a substituent.
- R 3 has a substituent An aryl group which may be substituted or an alkyl group which may have a substituent;
- R 4 and R 5 each independently have a hydrogen atom, an alkyl group which may have a substituent, or a substituent;
- Y is -Y 1 -Y 2 - indicates, Y 1 is -C (R 6) (R 7 ) - (R 6 ⁇ R 7 each independently represent a hydrogen atom, an optionally substituted alkyl group, which may have a substituent alken
- a good alkenyl group, an alkynyl group which may have a substituent, an alkoxy group which may have a substituent Represents an aralkyl group which may have a substituent, or an aryl group which may have a substituent), or a salt thereof.
- R 1 and R 2 are a hydrogen atom or an alkyl group
- R 3 is a phenyl group
- R 4 and R 5 are a hydrogen atom or an alkyl group
- Y is —C ( R 6) (R 7) - (R 6 and R 7 are each independently a hydrogen atom or an alkyl group, when R 7 represents an alkyl group is R 7 combine with the phenyl group represented by R 3 ring
- the above compound or a salt thereof which is an o-phenylene group or a naphthalene-1,2-diyl group.
- R 1 , R 2 , R 3 , R 4 , R 5 and Y are as defined above;
- R 11 represents a hydrogen atom or a hydroxyl-protecting group;
- R 12 , R 13 and R 14 Each independently represents a hydrogen atom, an alkoxy group, a fluorine atom, or a protected hydroxyl group;
- R 15 represents a hydrogen atom, a hydroxyl protecting group, or a solid phase carrier bonded via a linker as necessary;
- n is an integer of 0 or 1 or more).
- R 1 , R 2 , R 3 , R 4 , R 5 and Y are as defined above;
- R 21 represents a hydroxyl-protecting group;
- R 22 represents a hydrogen atom, an alkoxy group, a fluorine atom, Or a protected hydroxyl group;
- Bs represents a nucleobase).
- a method for producing a nucleic acid derivative comprising the following steps: (a) The following general formula (V): (Wherein R 13 , R 14 , R 15 , and n are as defined above) And a nucleotide derivative represented by the above general formula (IV) (wherein R 1 , R 2 , R 3 , R 4 , R 5 , and Y are as defined above; R 21 is R 22 represents a protective group for hydroxyl group; R 22 represents a hydrogen atom, an alkoxy group, a fluorine atom, or a protected hydroxyl group; Bs represents a nucleobase, and is reacted with the above general formula (III) (where R 1 , R 2 , R 3 , R 4 , R 5 , Y, and n are as defined above; R 11 represents a hydroxyl-protecting group; R 12 , R 13 , and R 14 are each independently a hydrogen atom , An alkoxy
- 3% dichloroacetic acid (DCA) / dichloromethane can be used as the acidic condition for removing the asymmetric auxiliary group represented by the general formula (II) in the step (c).
- the modification of the phosphorus atom in the step (d) includes a group represented by X (X is an alkylthio group which may have a substituent, an alkenylthio group which may have a substituent, a substituent.
- alkynylthio which may have a substituent arylthio group, a thiol group, an alkoxy group which may have a substituent, -BH 3, -Se -, have a substituent
- a good alkenyl group, an alkynyl group which may have a substituent, or an ant which may have a substituent The a group) represented by indicating the Le group) can be introduced on the phosphorus atom.
- R 101 and R 102 each independently represents a hydrogen atom, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, or an alkynyl which may have a substituent.
- R 103 represents a cyano group, a halogen atom, a substituent
- Z represents —Z 1 —Z 2 —, and Z 1 represents —C (R 104 ) (R 105 ) — (R 104 and R 105 each independently represents a hydrogen atom or an alkyl which may have a substituent.
- Z 2 is a single bond Or -C (R 106 ) (R 107 )-(R 106 and R 107 are each independently a hydrogen atom, an optionally substituted alkyl group, an optionally substituted alkenyl group, or a substituted group.
- An alkynyl group which may have a group, an alkoxy group which may have a substituent, an aralkyl group which may have a substituent, or an aryl group which may have a substituent) Or a salt thereof is provided.
- R 101 and R 102 are a hydrogen atom or an alkyl group
- R 103 is a cyano group
- Z is —C (R 104 ) (R 105 ) —
- R 104 and R 105 Is a hydrogen atom or an alkyl group), or a salt thereof
- R 101 and R 102 are a hydrogen atom
- R 103 is a cyano group
- Z is- There is provided the above compound or a salt thereof which is C (R 104 ) (R 105 ) — (where R 104 and R 105 are hydrogen atoms).
- R 101 , R 102 , R 103 , and Z are as defined above;
- R 111 represents a hydrogen atom or a hydroxyl-protecting group;
- R 112 and R 114 are each independently a hydrogen atom, an alkoxy group, A fluorine atom or a protected hydroxyl group;
- R 113 represents a hydrogen atom, a hydroxyl protecting group, or a solid phase carrier bonded via a linker as necessary;
- Bs represents a nucleobase;
- m represents 1 or more A nucleic acid derivative represented by the following formula:
- R 101 , R 102 , R 103 , and Z are as defined above;
- R 121 represents a hydroxyl-protecting group;
- R 122 represents a hydrogen atom, an alkoxy group, a fluorine atom, or a protected hydroxyl group.
- the nucleotide derivative is provided as follows: Bs represents nucleobase).
- a method for producing a nucleic acid derivative comprising the following steps: (a) The following general formula (XIII '): Wherein R 101 , R 102 , R 103 , and Z are as defined above, and R 112 and R 114 each independently represent a hydrogen atom, an alkoxy group, a fluorine atom, or a protected hydroxyl group; R 113 Indicates a solid phase carrier bound via a linker as necessary; p indicates 0 or an integer of 1 or more; Bs indicates a nucleobase) And a nucleotide derivative represented by the above general formula (XIV) (wherein R 121 represents a hydroxyl-protecting group; R 122 represents a hydrogen atom, an alkoxy group, a fluorine atom, or a protected hydroxyl group) after reacting the shown), using an electrophilic agent X (X is a thiol group, -BH 3, -Se - introducing shown), by
- alkyl group a linear, branched, cyclic, or a combination thereof can be used.
- a C 1 to C 15 alkyl group is preferable, and a C 1 to C 10 alkyl group is preferable. More preferred are C 1 -C 6 alkyl groups.
- the same applies to the alkyl part of other substituents having an alkyl part for example, an alkoxy group, a halogenated alkyl group, etc.).
- alkenyl group an alkenyl group composed of linear, branched, cyclic, or a combination thereof can be used.
- a C 2 to C 15 alkenyl group is preferable, and a C 2 to C 10 alkenyl group is More preferred is a C 2 -C 6 alkenyl group.
- the number of double bonds contained in the alkenyl group is not particularly limited, and is, for example, 1 to several, preferably about 1 or 2.
- the cyclic alkenyl group includes a partially saturated carbocyclic group in which any number of double bonds excluding at least one double bond of aryl groups are replaced with a single bond, or a heteroaryl group.
- a partially saturated heterocyclic group in which any number of double bonds excluding at least one double bond among the heavy bonds is replaced with a single bond is also included.
- alkynyl group a linear or branched alkynyl group can be used.
- a C 2 to C 15 alkynyl group is preferable, a C 2 to C 10 alkynyl group is more preferable, and a C 2 to C 6 group is preferable. More preferred is an alkynyl group.
- the number of triple bonds contained in the alkynyl group is not particularly limited, but is, for example, 1 to several, preferably about 1 or 2.
- the alkynyl group may contain 1 to several double bonds.
- the alkynyl group may be combined with a cyclic alkyl group or a cyclic alkenyl group.
- ethynyl group prop-1-in-1-yl, prop-2-yn-1-yl, but-1-in-1-yl group, but-3-in-1-yl group, 1-methylprop -2-In-1-yl, penta-1-in-1-yl group, penta-4-in-1-yl group, hexa-1-in-1-yl group, hexa-5-in-1- Yl group, hepta-1-in-1-yl group, hepta-6-in-1-yl group, octa-1-in-1-yl group, octa-7-in-1-yl group, nona-1 -In-1-yl group, Nona-8-in-1-yl group, Dec-1-in-1-yl group, Deca-9-in-1-yl group, Undec-1-in-1-yl group Group, undec-10-in-1-yl group, dodec-1-in-1-yl group, dodec-11-in-1-yl
- aryl group a monocyclic or condensed polycyclic aromatic hydrocarbon group can be used, and examples thereof include a phenyl group, a 1-naphthyl group, a 2-naphthyl group, an anthranyl group, and a phenanthryl group.
- a phenyl group is preferred.
- aryl group used in the present specification includes heteroaryl groups.
- the heteroaryl group a monocyclic or condensed polycyclic aromatic heterocyclic group can be used.
- the number of ring-constituting heteroatoms is not particularly limited, but is about 1 to several, preferably about 1 to 5. When two or more ring heteroatoms are contained, they may be the same or different. Examples of the hetero atom include, but are not limited to, an oxygen atom, a nitrogen atom, or a sulfur atom.
- Examples of the monocyclic heteroaryl group include 2-furyl group, 3-furyl group, 2-thienyl group, 3-thienyl group, 1-pyrrolyl group, 2-pyrrolyl group, 3-pyrrolyl group, 2-oxazolyl group.
- Examples of the condensed polycyclic heteroaryl group include 2-benzofuranyl group, 3-benzofuranyl group, 4-benzofuranyl group, 5-benzofuranyl group, 6-benzofuranyl group, 7-benzofuranyl group, 1-isobenzofuranyl group, 4-isobenzofuranyl group, 5-isobenzofuranyl group, 2-benzo [b] thienyl group, 3-benzo [b] thienyl group, 4-benzo [b] thienyl group, 5-benzo [b] thienyl Group, 6-benzo [b] thienyl group, 7-benzo [b] thienyl group, 1-benzo [c] thienyl group, 4-benzo [c] thienyl group, 5-benzo [c] thienyl group, 1-indolyl Group, 1-indolyl group, 2-indolyl group, 3-indolyl group, 4-indolyl group, 5-ind
- alkoxy group examples include a methoxy group, an ethoxy group, an n-propoxy group, an isopropoxy group, an n-butoxy group, an isobutoxy group, a sec-butoxy group, a tert-butoxy group, an n-pentyloxy group, and an isopentyloxy group.
- alkoxy group used in the present specification includes an alkenyloxy group and an alkynyloxy group in addition to an alkyloxy group.
- alkenyl part of the alkenyloxy group and the alkynyl part in the alkynyloxy group the alkenyl group and alkynyl group described above can be used.
- Aralkyl group means a group in which one or two or more of the above aryl groups are substituted on the above alkyl group, and when two or more aryl groups are substituted, they may be the same or different .
- benzyl group pyridylmethyl group, 1-naphthylmethyl group, 2-naphthylmethyl group, anthracenylmethyl group, phenanthrenylmethyl group, acenaphthylenylmethyl group, diphenylmethyl group, 1-phenethyl group, Examples thereof include, but are not limited to, a 2-phenethyl group and a 1- (1-naphthyl) ethyl group.
- halogen atom examples include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
- alkyl part, alkenyl part, alkynyl part, and aryl part of the alkylthio group, alkenylthio group, alkynylthio group, and arylthio group the alkyl group, alkenyl group, alkynyl group, and aryl group described above can be used. .
- the halogenated alkyl group means a group in which one or more halogen atoms are substituted on the above alkyl group, and when two or more halogen atoms are substituted, they may be the same or different. Good.
- fluoromethyl group, difluoromethyl group, trifluoromethyl group chloromethyl group
- substituents when “may have a substituent” for a certain functional group, one or more substituents are present at chemically possible positions on the functional group. Means there is.
- the kind of substituents present in the functional group, the number of substituents, and the substitution position are not particularly limited, and when two or more substituents are present, they may be the same or different.
- Examples of the substituent present in the functional group include a halogen atom, an oxo group, a thioxo group, a nitro group, a nitroso group, a cyano group, an isocyano group, a cyanato group, a thiocyanato group, an isocyanato group, an isothiocyanato group, a hydroxy group, and a sulfanyl group.
- substituents may be further substituted with one or more other substituents.
- substituents include, for example, C 1 -C 6 halogenated alkyl groups (eg, chloromethyl group, dichloromethyl group, trichloromethyl group, difluoromethyl group, trifluoromethyl group, 2,2,2-trifluoro group).
- the first embodiment of the present invention is an embodiment in which the compound represented by the general formula (I) is used as an acid-removable asymmetric auxiliary group.
- R 1 and R 2 each independently have a hydrogen atom, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, or a substituent.
- R 1 and R 2 each independently represent a hydrogen atom or an alkyl group, and it is more preferable that both R 1 and R 2 are hydrogen atoms.
- R 3 represents an aryl group which may have a substituent or an alkyl group which may have a substituent, preferably an aryl group, and more preferably a phenyl group.
- R 4 and R 5 are each independently a hydrogen atom, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an alkynyl group which may have a substituent, or a substituent.
- An alkoxy group which may have a substituent, an aralkyl group which may have a substituent, or an aryl group which may have a substituent is shown.
- R 4 and R 5 each independently represent a hydrogen atom or an alkyl group, and it is more preferable that both R 4 and R 5 are hydrogen atoms.
- Y represents —Y 1 —Y 2 —
- Y 1 represents —C (R 6 ) (R 7 ) — or an o-aryldiyl group which may have a substituent
- R 6 and R 7 are each independently a hydrogen atom, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an alkynyl group which may have a substituent, or a substituent.
- R 6 and R 7 each independently represent a hydrogen atom or an alkyl group
- the o-aryldiyl group represented by Y include, but are not limited to, an o-phenylene group or a naphthalene-1,2-diyl group.
- the aryl ring of the aryldiyl group may be bonded to the aryl group represented by R 3 to form a ring.
- Y 2 represents a single bond or —C (R 8 ) (R 9 ) —.
- R 8 and R 9 are each independently a hydrogen atom, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an alkynyl group which may have a substituent, or a substituent.
- An alkoxy group which may have a substituent, an aralkyl group which may have a substituent, or an aryl group which may have a substituent is shown.
- Y 2 is preferably a single bond. In this case, Y represents —C (R 6 ) (R 7 ) — or an o-aryldiyl group which may have a substituent.
- Preferred compounds included in the general formula (I) are exemplified below, but are not limited thereto.
- More preferable compounds include the following compounds, but are not limited thereto.
- the compound represented by the general formula (I) may form an acid addition salt, but any acid addition salt is included in the scope of the present invention.
- mineral acid salts such as hydrochloride, sulfate and nitrate, organic acid salts such as acetate, p-toluenesulfonate, methanesulfonate, maleate and oxalate can be used. It is not limited to.
- any stereoisomer in a pure form of the compound represented by the general formula (I), any mixture of stereoisomers, racemate, diastereomer mixture and the like are also included in the scope of the present invention. It is preferred to use an optically pure form of the compound.
- any hydrate or solvate of the compound represented by the general formula (I) or a salt thereof is also included in the scope of the present invention. The same applies to the nucleic acid derivative represented by the general formula (II).
- the group represented by the above general formula (II) is introduced onto the phosphorus atom of the nucleic acid derivative as an asymmetric auxiliary group.
- examples of the nucleic acid derivative include phosphorothioate, boranophosphate, alkyl phosphonate, alkenyl phosphonate, alkynyl phosphonate, aryl phosphonate, phosphoroselenoate, or phosphoramidate. It is not limited to these.
- Preferred examples of the nucleic acid derivative to which the asymmetric auxiliary group represented by the general formula (II) is bonded include, for example, a nucleic acid derivative represented by the general formula (III).
- examples of the hydroxyl-protecting group include a dimethoxytrityl group, an acetyl group, a benzoyl group, a methoxybenzoyl group, a trifluoroacetyl group, and a trimethylsilyl group, but are not limited thereto. There is no.
- protecting group of the hydroxyl group reference can be made to, for example, Green, et al., Protective Groups, Organic, Synthesis, 3rd Edition, 1999, John, Wiley, Sons, Inc.
- a natural or non-natural nucleobase which may have a protecting group can be used, for example, a pyrimidine base such as cytosine, thymine or uracil, or a purine base such as adenine or guanine can be used.
- a pyrimidine base such as cytosine, thymine or uracil
- a purine base such as adenine or guanine
- the base include 5-methylcytosine, 5-hydroxymethylcytosine, 5-fluorouracil, 5-methyluracil, 2-thiouracil, 6-azauracil, 5-hydroxyuracil, 2,6-diaminopurine, 8-azaadenine.
- a modified base such as 8-azaguanine or isoguanine may be used, but is not limited thereto.
- the linker means a generally linear divalent group that intervenes between the solid phase carrier and the nucleic acid derivative.
- the linker may be a linear group that may have a substituent.
- alkylene groups branched chain alkylene groups, peptide linkers, and the like can be used.
- a 3-aminopropyl group, a succinyl group, a 2,2′-diethanolsulfonyl group, a long chain alkylamino (LCAA) group and the like can be used, but are not limited thereto.
- the type of the solid phase carrier is not particularly limited, but, for example, fixed pore glass (CPG), oxalylated-constant glass (eg, Nucleic® Acids® Research, 19, 1527, 1991), TentaGel support-aminopolyethylene glycol derivatization support (Tetrahedron Letters, 34, 3373, 1993), Poros-polystyrene / divinylbenzene copolymer, and the like, but are not limited thereto.
- CPG fixed pore glass
- oxalylated-constant glass eg, Nucleic® Acids® Research, 19, 1527, 1991
- TentaGel support-aminopolyethylene glycol derivatization support Tetrahedron Letters, 34, 3373, 1993
- Poros-polystyrene / divinylbenzene copolymer and the like, but are not limited thereto.
- the method for producing a nucleic acid derivative of the present invention using the above asymmetric auxiliary group typically comprises the following steps: (a) a nucleic acid derivative represented by the general formula (V) and a general formula (IV).
- the compound of the general formula (IV) used in the above-described method is obtained by activating the achiral mononucleotide monomer as necessary, for example, according to the method described in International Publication WO 2010/064146. It can manufacture by making the compound represented react.
- the compound represented by the general formula (IV) is a tricyclic active intermediate and is obtained from a reaction intermediate produced from a compound represented by Formula®Q and Formula®R disclosed in International Publication WO 2010/064146. Have high reactivity.
- 3% dichloroacetic acid (DCA) / dichloromethane can be used as acidic conditions for removing the asymmetric auxiliary group represented by the general formula (II) in step (b).
- This acidic condition is a condition for removing an asymmetric auxiliary group (1% trifluoroacetic acid (TFA) / dichloromethane introduced using the compound represented by Formula Q and FormulaFormR disclosed in International Publication WO 2010/064146. ) And a milder acidic condition than that of an adenine base in which the base moiety is protected with an acyl-type protecting group.
- reaction mechanism by which the asymmetric auxiliary group represented by the general formula (II) is eliminated under acidic conditions is presumed to be the following S N 1 (E1 reaction) mechanism.
- the following reaction scheme shows one preferred embodiment of the asymmetric auxiliary group represented by the general formula (II).
- the second embodiment of the present invention is an embodiment in which the compound represented by the general formula (XI) is used as a base-elimination type asymmetric auxiliary group.
- R 101 and R 102 each independently have a hydrogen atom, an alkyl group that may have a substituent, an alkenyl group that may have a substituent, or a substituent.
- R 101 and R 102 are preferably hydrogen atoms or alkyl groups, and both R 101 and R 102 are more preferably hydrogen atoms.
- R 103 represents a cyano group, a halogen atom, a halogenated alkyl group which may have a substituent, a halogenated alkanoyl group which may have a substituent, a sulfonyl group, or a halogen which may have a substituent. Represents an alkylsulfonyl group or a nitro group. R 103 is preferably a cyano group.
- Z represents -Z 1 -Z 2-
- Z 1 represents -C (R 104 ) (R 105 )-.
- R 104 and R 105 are each independently a hydrogen atom, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an alkynyl group which may have a substituent, or a substituent.
- An alkoxy group which may have a substituent, an aralkyl group which may have a substituent, or an aryl group which may have a substituent is shown.
- R 104 and R 105 are preferably hydrogen atoms or alkyl groups, and both R 104 and R 105 are more preferably hydrogen atoms.
- Z 2 represents a single bond or —C (R 106 ) (R 107 ) —.
- R 106 and R 107 are each independently a hydrogen atom, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an alkynyl group which may have a substituent, or a substituent.
- An alkoxy group which may have a substituent, an aralkyl group which may have a substituent, or an aryl group which may have a substituent is shown.
- Z 2 is preferably a single bond or —C (R 106 ) (R 107 ) — (R 106 and R 107 represent a hydrogen atom), and more preferably Z 2 is a single bond.
- R 101 and R 102 are a hydrogen atom or an alkyl group
- R 103 is a cyano group
- Z is —C (R 104 ) (R 105 ) — or —C (R 104 ) ( R 105 ) —CH 2 — (where R 104 and R 105 are a hydrogen atom or an alkyl group) is preferred
- R 101 and R 102 are a hydrogen atom
- R 103 is a cyano group
- Z is — More preferred is a compound that is C (R 104 ) (R 105 ) — (where R 104 and R 105 are hydrogen atoms).
- More preferable compounds include the following compounds, but are not limited thereto.
- the compound represented by the general formula (XI) may form an acid addition salt, but any acid addition salt is included in the scope of the present invention.
- mineral acid salts such as hydrochloride, sulfate and nitrate, organic acid salts such as acetate, p-toluenesulfonate, methanesulfonate, maleate and oxalate can be used. It is not limited to.
- any stereoisomer in a pure form of the compound represented by the general formula (XI), any mixture of stereoisomers, racemate, diastereomer mixture, and the like are also included in the scope of the present invention. It is preferred to use an optically pure form of the compound.
- any hydrate or solvate of the compound represented by the general formula (XI) or a salt thereof is also included in the scope of the present invention. The same applies to the nucleic acid derivative represented by the general formula (XII).
- the group represented by the general formula (XII) is introduced onto the phosphorus atom of the nucleic acid derivative as an asymmetric auxiliary group.
- examples of the nucleic acid derivative include, but are not limited to, phosphorothioate, boranophosphate, phosphoroselenoate, and the like.
- the group represented by the general formula (XII) is introduced onto the phosphorus atom of the nucleic acid derivative as an asymmetric auxiliary group.
- examples of the nucleic acid derivative include, but are not limited to, phosphorothioate, boranophosphate, phosphoroselenoate, and the like.
- nucleic acid derivative to which the asymmetric auxiliary group represented by the general formula (XII) is bonded include, for example, a nucleic acid derivative represented by the general formula (XIII).
- the hydroxyl protecting group, nucleobase, linker, and solid phase carrier are the same as those described in the general formula (III).
- the method for producing a nucleic acid derivative of the present invention using the above asymmetric auxiliary group typically comprises the following steps: (a) a nucleic acid derivative represented by the general formula (XIII ′) and a general formula (XIV) After reacting with the nucleotide derivative represented (wherein R 121 represents a hydroxyl-protecting group; R 122 represents a hydrogen atom, an alkoxy group, a fluorine atom, or a protected hydroxyl group), an electrophile is used.
- a nucleic acid derivative represented by the general formula (XV) is produced by introducing X and removing the protecting group of the hydroxyl group represented by R 121 , and the above reaction is repeated as necessary to represent the nucleic acid derivative represented by the general formula (XV).
- This method can be performed in the same manner as the cycle indicated by Route A in the scheme described in the background art of the reaction process of International Publication WO 2010/064146.
- the compound of the general formula (XIV) used in the above-described method is obtained by activating the achiral mononucleotide monomer as necessary, for example, according to the method described in International Publication WO 2010/064146. It can manufacture by making the compound represented react.
- the compound represented by the general formula (XIV) is a tricyclic active intermediate, and is obtained from a reaction intermediate produced from a compound represented by Formula®O and Formula®P disclosed in International Publication WO ⁇ 2010/064146. Have high reactivity.
- basic conditions for removing the asymmetric auxiliary group represented by the general formula (II) in step (b) include 10% DBU / acetonitrile (room temperature 15 minutes), 10% piperidine / acetonitrile (room temperature 15 minutes), or aqueous ammonia (room temperature 12 hours), etc.
- the conditions are asymmetry introduced using the compounds represented by Formula®O and Formula®P disclosed in International Publication WO 2010/064146.
- the basic conditions are milder than the basic conditions for removing the auxiliary groups (conditions in which ammonia water is used for 12 hours at 55 ° C. for elimination as an aziridine compound). Since the asymmetric auxiliary group represented by the general formula (II) can be removed by the ⁇ elimination mechanism shown below under such a relaxed condition, a long-chain nucleic acid derivative can be produced very efficiently. There are features.
- Example 1 (a) 3-Cyano-3-phenylisobenzofuran-1 (3H) -one (1).
- N-Boc-3-piperidone (1 g, 5 mmol) azeotropically dried with dehydrated toluene was dissolved in dehydrated tetrahydrofuran (10 mL).
- 1.08M phenylmagnesium bromide in tetrahydrofuran (6.9 mL, 7.5 mmol) was slowly added at ⁇ 30 ° C. and the reaction was stirred at ⁇ 30 ° C. for 30 min. The reaction was gradually warmed to room temperature and stirred for an additional 12 hours.
- Example 2 (a) Basic procedure for solid-phase synthesis of X-phosphonate DNA using an acid-removable asymmetric auxiliary group (general formula I) 5'-O- (DMTr) nucleoside (0.5 ⁇ mol) bound to HCP or CPG via a succinyl linker or oxalyl linker is treated with a 3% dichloroacetic acid / dichloromethane solution to remove the 5'-DMTr group and dichloromethane And dry under vacuum.
- the chain extension reaction is achieved by repeating the following steps (a) and (b).
- (a) The condensation reaction (5 minutes) is carried out in a corresponding monomer solution activated in advance in an argon atmosphere.
- Preparation of the pre-activated (R P )-and (S P ) -monomer solutions is carried out by the following method.
- 8-diazabicyclo [5.4.0] undec-7-enium 5'-O- (DMTr) -2'-deoxynucleoside-3'-ylphosphonate (25 ⁇ mol) was azeotropically dried with dehydrated toluene and dehydrated acetonitrile-N- Dissolve in cyanomethylpyrrolidine solution (volume ratio 9: 1).
- Add triphenylphosphine dichloride (62.5 ⁇ mol) to the reaction mixture and stir for 10 minutes.
- Compound 2a, 4a, or 6a (30 ⁇ mol; compound 2b, 4b, or 6b in the case of “S P ” solution) is added and stirred for another 10 minutes to obtain a pre-activated monomer solution.
- N-propyl phosphoramidate (f)
- the oligonucleoside H phosphonate bonded to HCP or CPG obtained through the above method via an oxalyl linker was treated with a carbon tetrachloride-propylamine (9: 1 volume ratio) solution at room temperature for 1 hour, and then methanol. Wash. The organic solvent is collected, concentrated to dryness under reduced pressure, treated with 25% aqueous ammonia at room temperature for 12 hours, and washed with water. The aqueous solution is collected and concentrated under reduced pressure, and the residue is purified by reverse phase HPLC to give stereocontrolled N-propyl phosphoramidate DNA.
- Example 3 (a) Basic procedure for solid-phase synthesis of X-phosphonate RNA using an acid-removable asymmetric auxiliary group (general formula I) 5'-O- (DMTr) nucleoside (0.5 ⁇ mol) bound to HCP or CPG via a succinyl linker or oxalyl linker is treated with a 3% dichloroacetic acid / dichloromethane solution to remove the 5'-DMTr group and dichloromethane And dry under vacuum.
- the chain extension reaction is achieved by repeating the following steps (a) and (b).
- (a) The condensation reaction (15 minutes) is carried out in a corresponding monomer solution * activated in advance in an argon atmosphere.
- Preparation of the pre-activated (R P )-and (S P ) -monomer solutions is carried out by the following method.
- 8-diazabicyclo [5.4.0] undec-7-enium 5'-O- (DMTr) -2'-O- (TBS) ribonucleoside-3'-ylphosphonate 25 ⁇ mol was azeotropically dried with dehydrated toluene, Dissolve in dehydrated acetonitrile-N-cyanomethylpyrrolidine solution (volume ratio 9: 1).
- triphenylphosphine dichloride (62.5 ⁇ mol) to the reaction mixture and stir for 10 minutes.
- Compound 2a, 4a, or 6a (30 ⁇ mol; in the case of “S P ” solution, compound 2b, 4b, 6b) is added and stirred for another 10 minutes to obtain a pre-activated monomer solution.
- the filtrate is diluted with a 25% aqueous ammonia-ethanol solution (volume ratio 3: 1), sealed in a flask, and treated at room temperature for 12 hours.
- the solution is concentrated under reduced pressure and the residue is purified by reverse phase HPLC.
- Fractions containing the desired phosphorothioate RNA protected at the 2 ′ position with a TBS group are collected and lyophilized.
- the residue is treated with a dehydrated tetrahydrofuran solution of 1 molar tetrabutylammonium fluoride for 24 hours. Add 0.05 molar triethylammonium acetate buffer (pH 6.9) and concentrate and remove tetrahydrofuran.
- the residue is desalted with Sep-Pak PLUS tC 18 and purified by reverse phase HPLC to give a stereocontrolled phosphorothioate RNA.
- the filtrate is diluted with 25% aqueous ammonia-ethanol solution (volume ratio 3: 1), sealed in a flask and treated at room temperature for 12 hours.
- the solution is concentrated under reduced pressure and the residue is purified by reverse phase HPLC.
- Fractions containing boranophosphate RNA protected at the 2 ′ position with a TBS group are collected and lyophilized.
- the residue is treated with a dehydrated tetrahydrofuran solution of 1 molar tetrabutylammonium fluoride for 24 hours. Add 0.05 molar triethylammonium acetate buffer (pH 6.9) and concentrate and remove tetrahydrofuran.
- the residue is desalted with Sep-Pak PLUS tC 18 and purified by reverse phase HPLC to yield sterically controlled boranophosphate RNA.
- the filtrate is diluted with 25% aqueous ammonia-ethanol solution (volume ratio 3: 1), sealed in a flask and treated at room temperature for 12 hours.
- the solution is concentrated under reduced pressure and the residue is purified by reverse phase HPLC.
- Fractions containing hydroxymethylphosphonate RNA of interest 2'-position protected with TBS group are collected and lyophilized.
- the residue is treated with a dehydrated tetrahydrofuran solution of 1 molar tetrabutylammonium fluoride for 24 hours. Add 0.05 molar triethylammonium acetate buffer (pH 6.9) and concentrate and remove tetrahydrofuran.
- the residue is desalted with Sep-Pak PLUS tC 18 and purified by reverse phase HPLC to give a stereocontrolled hydroxymethylphosphonate RNA.
- Fractions containing the desired phosphoramidate RNA protected at the 2 ′ position with a TBS group are collected and lyophilized.
- the residue is treated with a dehydrated tetrahydrofuran solution of 1 molar tetrabutylammonium fluoride for 24 hours.
- the residue is desalted with Sep-Pak PLUS tC 18 and purified by reverse phase HPLC to give a stereocontrolled phosphoramidate RNA.
- N-propyl phosphoramidate (f)
- the oligonucleoside H phosphonate bonded to HCP or CPG obtained through the above method via an oxalyl linker was treated with a carbon tetrachloride-propylamine (9: 1 volume ratio) solution at room temperature for 1 hour, and then methanol. Wash. The organic solvent is collected and concentrated to dryness under reduced pressure. Dilute with 25% aqueous ammonia-ethanol solution (volume ratio 3: 1), seal in a flask, and treat at room temperature for 12 hours. The solution is concentrated under reduced pressure and the residue is purified by reverse phase HPLC.
- Example 4 (a) Basic procedure for solid-phase synthesis of X-phosphonate DNA using base-removable asymmetric auxiliary groups (general formula XI) A 5′-O- (DMTr) nucleoside (0.5 ⁇ mol) linked to HCP or CPG via a succinyl linker or oxalyl linker is used for synthesis. Chain extension is achieved by repeating the steps described in Table 1. After the chain length extension, the asymmetric auxiliary group is removed with an anhydrous 10% DBU / acetonitrile solution at room temperature for 15 minutes and washed with acetonitrile.
- base-removable asymmetric auxiliary groups generally formula XI
- DMTr 5′-O- (DMTr) nucleoside (0.5 ⁇ mol) linked to HCP or CPG via a succinyl linker or oxalyl linker is used for synthesis.
- Chain extension is achieved by repeating the steps described in Table 1. After the chain length extension, the asymmetric
- the 5'-O-DMTr group is then removed with a 3% dichloroacetic acid / dichloromethane solution and washed with dichloromethane.
- a solid support containing 0.5 micromolar oligonucleotide is suspended in 25% aqueous ammonia (1 mL) and treated at 55 ° C. for 12 hours to remove the protecting group at the nucleobase site and simultaneously remove the oligomer from HCP or CPG. Release. After centrifugation, the supernatant is transferred to a round bottom flask and the solid support is washed with water (2 x 0.5 mL).
- Activated (R P )-and (S P ) -monomer solutions are prepared by the following method. 8-diazabicyclo [5.4.0] undec-7-enium 5'-O- (DMTr) -2'-deoxynucleoside-3'-ylphosphonate (25 ⁇ mol) was azeotropically dried with dehydrated toluene and dehydrated acetonitrile-N- Dissolve in cyanomethylpyrrolidine solution (volume ratio 9: 1). Add triphenylphosphine dichloride (62.5 ⁇ mol) to the reaction mixture and stir for 10 minutes. Compound 8a or 12a (30 ⁇ mol; compound 8b or 12b in the case of “S P ” solution) is added and stirred for another 10 minutes to obtain a pre-activated monomer solution.
- DMTr deoxynucleoside-3'-ylphosphonate
- Example 5 (a) Basic procedure for solid-phase synthesis of X-phosphonate RNA using acid-removable asymmetric auxiliary groups (general formula XI) 5′-O- (DMTr) ribonucleoside (0.5 ⁇ mol) bound to HCP or CPG via a succinyl linker or oxalyl linker is used for synthesis.
- the chain extension reaction is achieved by repeating the steps described in Table 2. After the chain length extension, the asymmetric auxiliary group is removed with an anhydrous 10% DBU / acetonitrile solution at room temperature for 15 minutes and washed with acetonitrile.
- the 5'-O-DMTr group is then removed with a 3% dichloroacetic acid / dichloromethane solution and washed with dichloromethane.
- a solid support containing 0.5 micromolar oligonucleotide is suspended in a 25% ammonia water-ethanol mixture (volume ratio 3: 1, 1 mL) and treated at room temperature for 48 hours to remove the protecting group at the nucleobase site.
- the oligomer is released from HCP or CPG. After centrifugation, the supernatant is transferred to a round bottom flask and the solid support is washed with water (2 x 0.5 mL).
- Activated (R P )-and (S P ) -monomer solutions are prepared by the following method. 8-diazabicyclo [5.4.0] undec-7-enium 5'-O- (DMTr) -2'-O- (TBS) ribonucleoside-3'-ylphosphonate (25 ⁇ mol) was azeotropically dried with dehydrated toluene, Dissolve in dehydrated acetonitrile-N-cyanomethylpyrrolidine solution (volume ratio 9: 1). Add triphenylphosphine dichloride (62.5 ⁇ mol) to the reaction mixture and stir for 10 minutes.
Abstract
Description
より具体的には、上記の4種の化合物のうちFormula Q及びFormula Rで表される化合物を用いて導入された不斉補助基は、強い酸性条件、例えば1% トリフルオロ酢酸(TFA)/ジクロロメタンを用いてカチオンを発生させることにより下記のSN1機構で脱離させることができる。しかしながら、この酸性条件はアシル型の保護基で塩基部位を保護したアデニン塩基(一般的にはアデニン塩基にはアシル型の保護基が導入されている)の脱離(デプリネーション)が生じる条件であることから、この不斉補助基を用いる場合にはアデニン塩基をアミジン型、トリチル型、又はジアシル型などの保護基で保護しなければならないという問題が生じる(下記のスキーム中、Bsは核酸塩基、Meはメチル基、Phはフェニル基を示す)。
本発明はこれらの知見を基にして完成されたものである。
(a)下記一般式(V):
で表される核酸誘導体と、上記一般式(IV)で表されるヌクレオチド誘導体(ただし、R1、R2、R3、R4、R5、及びYは上記と同義であり;R21は水酸基の保護基を示し;R22は水素原子、アルコキシ基、フッ素原子、又は保護された水酸基を示し;Bsは核酸塩基を示す)とを反応させて、上記一般式(III)(ただし、R1、R2、R3、R4、R5、Y、及びnは上記と同義であり;R11は水酸基の保護基を示し;R12、R13、及びR14はそれぞれ独立に水素原子、アルコキシ基、フッ素原子、又は保護された水酸基を示し;R15は必要に応じてリンカーを介して結合した固相担体を示し;Bsは核酸塩基を示す)で表される核酸誘導体を製造する工程;
(b)上記工程(a)により得られた一般式(III)で表される核酸誘導体からR11で表される水酸基の保護基を除去し、必要に応じて、得られた核酸誘導体と一般式(IV)で表されるヌクレオチド誘導体とを反応させる工程を繰り返す工程;
(c)酸性条件下において一般式(II)で表される不斉補助基を除去して下記一般式(VI):
(d)上記工程(c)で得られた核酸誘導体のリン原子を修飾した後、必要に応じて保護基を脱離する工程
を含む方法が提供される。
また、工程(d)におけるリン原子の修飾としては、Xで表される基(Xは置換基を有していてもよいアルキルチオ基、置換基を有していてもよいアルケニルチオ基、置換基を有していてもよいアルキニルチオ基、置換基を有していてもよいアリールチオ基、チオール基、置換基を有していてもよいアルコキシ基、-BH3、-Se-、置換基を有していてもよいアルキル基、置換基を有していてもよいアルケニル基、置換基を有していてもよいアルキニル基、置換基を有していてもよいアリール基、置換基を有していてもよいアシル基、又は-N(R116)(R117)(R116及びR117はそれぞれ独立に水素原子、置換基を有していてもよいアルキル基、置換基を有していてもよいアルケニル基、置換基を有していてもよいアルキニル基、又は置換基を有していてもよいアリール基を示す)で表される基を示す)をリン原子上に導入することができる。
(a)下記一般式(XIII'):
で表される核酸誘導体と、上記一般式(XIV)で表されるヌクレオチド誘導体(ただし、R121は水酸基の保護基を示し;R122は水素原子、アルコキシ基、フッ素原子、又は保護された水酸基を示す)とを反応させた後に、求電子剤を用いてX(Xはチオール基、-BH3、-Se-を示す)を導入し、R121が示す水酸基の保護基を除去することにより下記一般式(XV):
(b)上記工程(a)により得られた上記一般式(XV)で表される核酸誘導体から塩基性条件下において一般式(XII)で表される不斉補助基を除去して下記一般式(XVII):
を含む方法が提供される。
アルキルチオ基、アルケニルチオ基、アルキニルチオ基、及びアリールチオ基のアルキル部分、アルケニル部分、アルキニル部分、及びアリール部分としては上記に説明したアルキル基、アルケニル基、アルキニル基、及びアリール基を用いることができる。
一般式(I)において、R1及びR2はそれぞれ独立に水素原子、置換基を有していてもよいアルキル基、置換基を有していてもよいアルケニル基、置換基を有していてもよいアルキニル基、置換基を有していてもよいアルコキシ基、置換基を有していてもよいアラルキル基、又は置換基を有していてもよいアリール基を示す。好ましくはR1及びR2はそれぞれ独立に水素原子又はアルキル基を示し、R1及びR2がともに水素原子であることがさらに好ましい。
R4及びR5はそれぞれ独立に水素原子、置換基を有していてもよいアルキル基、置換基を有していてもよいアルケニル基、置換基を有していてもよいアルキニル基、置換基を有していてもよいアルコキシ基、置換基を有していてもよいアラルキル基、又は置換基を有していてもよいアリール基を示す。好ましくはR4及びR5はそれぞれ独立に水素原子又はアルキル基を示し、R4及びR5がともに水素原子であることがさらに好ましい。
Y2は単結合又は-C(R8)(R9)-を示す。R8及びR9はそれぞれ独立に水素原子、置換基を有していてもよいアルキル基、置換基を有していてもよいアルケニル基、置換基を有していてもよいアルキニル基、置換基を有していてもよいアルコキシ基、置換基を有していてもよいアラルキル基、又は置換基を有していてもよいアリール基を示す。Y2は単結合であることが好ましく、この場合、Yは-C(R6)(R7)-を示すか、又は置換基を有していてもよいo-アリールジイル基を示す。
この方法は、背景技術において国際公開WO 2010/064146の反応工程を説明したスキーム中のRoute Bで示したサイクルと同様に行うことができる。
一般式(XI)において、R101及びR102はそれぞれ独立に水素原子、置換基を有していてもよいアルキル基、置換基を有していてもよいアルケニル基、置換基を有していてもよいアルキニル基、置換基を有していてもよいアルコキシ基、置換基を有していてもよいアラルキル基、置換基を有していてもよいアリール基を示す。R101及びR102は水素原子又はアルキル基であることが好ましく、R101及びR102がともに水素原子であることがより好ましい。
この方法は、背景技術において国際公開WO 2010/064146の反応工程を説明したスキーム中のRoute Aで示したサイクルと同様に行うことができる。
1H NMR (300 MHz, CDCl3) δ 8.01 (1H, d, J = 7.8 Hz), 7.81 (1H, t, J = 7.2 Hz), 7.71 (1H, t, J = 7.2 Hz), 7.56 (1H, d, J = 7.8 Hz), 7.52-7.40 (5H, m); 13C NMR (75.5 MHz, CDCl3) δ 167.3, 146.6, 135.8, 133.6, 131.4, 130.7, 129.3, 126.3, 125.7, 123.9, 123.2, 115.8, 79.6.
1H NMR (300 MHz, CDCl3) δ 7.22-7.18 (9H, m), 4.42 (1H, d, J = 11.7 Hz), 4.09 (1H, d, J = 11.7 Hz), 3.53 (1H, d, J = 12.0 Hz), 3.23 (1H, d, J = 12.0 Hz), 1.64 (2H, brs); 13C NMR (75.5 MHz, CDCl3) δ 145.4, 143.1, 140.8, 133.0, 128.2, 128.1, 127.5, 127.0, 125.7, 125.6, 77.3, 64.4, 51.7; ESI TOF-MS m/z Calcd for C15H16NO [M+H]+ 226.12, found 226.15.
1H NMR (300 MHz, CD3OD) δ 7.53 (2H, d, J = 6.9 Hz), 7.34 (2H, t, J = 6.9 Hz), 7.25 (1H, d, J = 6.9 Hz), 4.20-3.88 (1H, m), 3.88-3.71 (1H, m), 3.42-3.18 (1H, m), 3.08-2.93 (1H, m), 2.13-1.77 (3H, m), 1.58-1.47 (1H, m), 1.46 (9H, s); 13C NMR (75.5 MHz, CD3OD) δ 157.2, 147.5, 129.2, 128.1, 126.3, 81.0, 79.5, 72.4, 37.8, 28.7, 22.3.
1H NMR (300 MHz, CD3OD) δ 7.53-7.46 (2H, m), 7.37-7.29 (2H, m), 7.26-7.18 (1H, m), 3.08-2.99 (1H, m), 2.93-2.85 (1H, m), 2.81-2.72 (1H, m), 2.68-2.56 (1H, m), 2.13-1.80 (3H, m), 1.61-1.51 (1H, m); 13C NMR (75.5 MHz, CD3OD) δ 148.7, 129.2, 127.9, 125.8, 71.8, 57.4, 46.3, 37.2, 23.4; ESI TOF-MS m/z Calcd for C11H16NO [M+H]+ 178.12, found 178.14.
1H NMR (300 MHz, CDCl3) δ 7.52-7.28 (5H, m), 3.80-3.54 (4H, m), 2.42-2.10 (2H, m), 1.93 (1H, brs), 1.48 (9H, s).
1H NMR (300 MHz, CDCl3) δ 7.52-7.46 (2H, m), 7.41-7.24 (3H, m), 3.34 (1H, dt, J = 10.8, 7.8 Hz), 3.20-3.09 (2H, m), 3.03 (1H, d, J = 12.0 Hz), 2.27 (1H, ddd, J = 13.4, 9.3, 7.5 Hz), 2.18-2.06 (1H, m), 1.95 (1H, brs); 13C NMR (75.5 MHz, CD3OD) δ 146.0, 129.2, 128.0, 126.4, 83.1, 61.9, 46.8, 42.9; ESI TOF-MS m/z Calcd for C10H14NO [M+H]+ 164.11, found 164.13.
1H NMR (300 MHz, CDCl3) δ 4.64 (1H, q, J = 4.5 Hz),3.87-3.62 (3H, m), 3.47-3.31 (1H, m), 3.15-2.99 (1H, m), 2.46 (1H, brs), 1.47 (9H, s); ESI TOF-MS m/z Calcd for C10H14NO [M+H]+ 164.11, found 164.13.
1H NMR (300 MHz, CD3OD) δ 4.49 (1H, dt, J = 6.0, 3.6 Hz), 3.39 (1H, dd, J = 11.9, 8.1 Hz), 3.08 (1H, dd, 12.3, 5.4 Hz), 3.00 (1H, dd, J = 11.9, 5.7 Hz), 2.92-2.85 (1H, m), 2.80 (1H, dd, J = 12.3, 3.6 Hz); 13C NMR (100 MHz, CD3OD) δ 121.7, 77.5, 55.5, 50.8, 39.1; ESI TOF-MS m/z Calcd for C5H9N2O [M+H]+ 113.07, found 113.07.
(a)酸除去型不斉補助基を用いるX-ホスホネートDNAの固相合成の基本手順(一般式 I)
HCP若しくはCPGにサクシニルリンカー若しくはオキザリルリンカーを介して結合した5'-O-(DMTr)ヌクレオシド(0.5μmol)を3%ジクロロ酢酸/ジクロロメタン溶液で処理し、5'-DMTr基を除去し、ジクロロメタンで洗浄し、真空下で乾燥する。鎖長延長反応は以下の(a)、(b)の工程を繰り返し行なうことで達成する。(a)縮合反応(5分)は、事前に活性化した対応するモノマー溶液をアルゴン雰囲気下で行なう。縮合後、固相担体を脱水アセトニトリルと脱水ジクロロメタンで洗浄する。(b) 5'-O-DMTrと不斉補助基の除去は3%ジクロロメタン/(ジクロロメタン-トリエチルシラン(体積比で1:1))溶液で処理することで同時に行い、続いてジクロロメタン及び脱水アセトニトリルで洗浄する。鎖長延長後、樹脂上にできたオリゴヌクレオシドHホスホネートはXホスホネートDNAに下に示す方法で変換する。
上記の方法で得られた、HCP若しくはCPGにサクシニルリンカーを介して結合したオリゴヌクレオシドHホスホネートを、10重量%S8/(二琉化炭素-ピリジン-トリエチルアミン)溶液(体積比35:35:1)に室温で3時間処理し、続いて二硫化炭素、ピリジン、アセトニトリルで洗浄する。樹脂を25%アンモニア水で室温12時間処理し、水で洗浄する。水溶液を集め、減圧下濃縮し、残渣を逆相HPLCで精製し、立体を制御したホスホロチオエートDNAを得る。
上記の方法で得られた、HCP若しくはCPGにオキザリルリンカーを介して結合したオリゴヌクレオシドHホスホネートに対し、脱水ジメチルホルムアミド、N,O-ビス(トリメチルシリル)アセトアミド、ボランジメチルスルフィドを加える。15分後、樹脂をジメチルホルムアミド、アセトニトリル、メタノールの順に洗浄する。樹脂をアンモニア/メタノール溶液で室温12時間処理し、メタノールで洗浄する。メタノール溶液を集め、減圧下濃縮し、残渣を逆相HPLCで精製し、立体を制御したボラノホスフェートDNAを得る。
上記の方法で得られた、HCP若しくはCPGにオキザリルリンカーを介して結合したオリゴヌクレオシドHホスホネートを、0.1Mトリメチルシリルクロリド/(ピリジン:1-メチル-2-ピロリドン(体積比1:9))溶液で室温10分間、ガス状のホルムアルデヒドで室温30分間処理し、次に1-メチル-2-ピロリドン、アセトニトリルで洗浄する。樹脂を25%アンモニア水で室温12時間処理し、水で洗浄する。水溶液を集め、減圧下濃縮し、残渣を逆相HPLCで精製し、立体を制御したヒドロキシメチルホスホネートDNAを得る。
上記の方法で得られた、HCP若しくはCPGにオキザリルリンカーを介して結合したオリゴヌクレオシドHホスホネートを、四塩化炭素-1、4-ジオキサン(体積比4:1)の飽和アンモニア溶液に0℃で30分間処理し、1、4-ジオキサンで洗浄する。有機溶媒を集め、減圧下濃縮乾燥し、25%アンモニア水で室温12時間処理し、水で洗浄する。水溶液を集め、減圧下濃縮し、残渣を逆相HPLCで精製し、立体を制御したホスホロアミデートDNAを得る。
上記の方法で得られた、HCP若しくはCPGにオキザリルリンカーを介して結合したオリゴヌクレオシドHホスホネートを、四塩化炭素-プロピルアミン(体積比9:1)溶液に室温で1時間処理し、メタノールで洗浄する。有機溶媒を集め、減圧下濃縮乾燥し、25%アンモニア水で室温12時間処理し、水で洗浄する。水溶液を集め、減圧下濃縮し、残渣を逆相HPLCで精製し、立体を制御したN-プロピルホスホロアミデートDNAを得る。
上記の方法で得られた、HCP若しくはCPGにオキザリルリンカーを介して結合したオリゴヌクレオシドHホスホネートを、四塩化炭素-2-ジメチルアニモエチルアミン(体積比9:1)溶液に室温で1時間処理し、アセトニトリルで洗浄する。有機溶媒を集め、減圧下濃縮乾燥し、25%アンモニア水で室温12時間処理し、水で洗浄する。水溶液を集め、減圧下濃縮し、残渣を逆相HPLCで精製し、立体を制御したN-[(2-ジメチルアミノ)エチル]ホスホロアミデートDNAを得る。
(a)酸除去型不斉補助基を用いるX-ホスホネートRNAの固相合成の基本手順(一般式 I)
HCP若しくはCPGにサクシニルリンカー若しくはオキザリルリンカーを介して結合した5'-O-(DMTr)ヌクレオシド(0.5μmol)を3%ジクロロ酢酸/ジクロロメタン溶液で処理し、5'-DMTr基を除去し、ジクロロメタンで洗浄し、真空下で乾燥する。鎖長延長反応は以下の(a)、(b)の工程を繰り返し行なうことで達成する。(a)縮合反応(15分)は、事前に活性化した対応するモノマー溶液*をアルゴン雰囲気下で行なう。縮合後、固相担体を脱水アセトニトリルと脱水ジクロロメタンで洗浄する。(b) 5'-O-DMTrと不斉補助基の除去は3%ジクロロメタン/(ジクロロメタン-トリエチルシラン(体積比で1:1))溶液で処理することで同時に行い、続いてジクロロメタン及び脱水アセトニトリルで洗浄する。鎖長延長後、樹脂上にできたオリゴヌクレオシドHホスホネートはXホスホネートRNAに下に示す方法で変換する。
上記の方法で得られた、HCP若しくはCPGにサクシニルリンカーを介して結合したオリゴヌクレオシドHホスホネートを、10重量%S8/(二琉化炭素-ピリジン-トリエチルアミン)溶液(体積比35:35:1)に室温で3時間処理し、続いて二硫化炭素、ピリジン、エタノールで洗浄する。次に樹脂を25%アンモニア水-エタノール溶液(体積比3:1)で室温2時間処理し、樹脂をフィルターでろ別する。ろ液を25%アンモニア水-エタノール溶液(体積比3:1)で希釈し、フラスコ内に密閉し、室温で12時間処理する。溶液を減圧下濃縮し、残渣を逆相HPLCで精製する。目的とする2'位がTBS基で保護されたホスホロチオエートRNAを含むフラクションを集め、凍結乾燥する。残渣を1モル濃度テトラブチルアンモニウムフルオリドの脱水テトラヒドロフラン溶液で24時間処理する。0.05モル濃度のトリエチルアンモニウムアセテートバッファー(pH6.9)を加え、テトラヒドロフランを濃縮除去する。残渣をSep-Pak PLUS tC18で脱塩し、逆相HPLCで精製し、立体を制御したホスホロチオエートRNAを得る。
上記の方法で得られた、HCP若しくはCPGにオキザリルリンカーを介して結合したオリゴヌクレオシドHホスホネートに対し、脱水ジメチルホルムアミド、N,O-ビス(トリメチルシリル)アセトアミド、ボランジメチルスルフィドを加える。15分後、樹脂をジメチルホルムアミド、アセトニトリル、エタノールの順に洗浄する。次に樹脂を25%アンモニア水-エタノール溶液(体積比3:1)で室温2時間処理し、樹脂をフィルターでろ別する。ろ液を25%アンモニア水-エタノール溶液(体積比3:1)で希釈し、フラスコ内に密閉し、室温で12時間処理する。溶液を減圧下濃縮し、残渣を逆相HPLCで精製する。目的とする2'位がTBS基で保護されたボラノホスフェートRNAを含むフラクションを集め、凍結乾燥する。残渣を1モル濃度テトラブチルアンモニウムフルオリドの脱水テトラヒドロフラン溶液で24時間処理する。0.05モル濃度のトリエチルアンモニウムアセテートバッファー(pH6.9)を加え、テトラヒドロフランを濃縮除去する。残渣をSep-Pak PLUS tC18で脱塩し、逆相HPLCで精製し、立体を制御したボラノホスフェートRNAを得る。
上記の方法で得られた、HCP若しくはCPGにオキザリルリンカーを介して結合したオリゴヌクレオシドHホスホネートを、0.1Mトリメチルシリルクロリド/(ピリジン:1-メチル-2-ピロリドン(体積比1:9))溶液で室温10分間、ガス状のホルムアルデヒドで室温30分間処理し、次に1-メチル-2-ピロリドン、エタノールで洗浄する。次に樹脂を25%アンモニア水-エタノール溶液(体積比3:1)で室温2時間処理し、樹脂をフィルターでろ別する。ろ液を25%アンモニア水-エタノール溶液(体積比3:1)で希釈し、フラスコ内に密閉し、室温で12時間処理する。溶液を減圧下濃縮し、残渣を逆相HPLCで精製する。目的とする2'位がTBS基で保護されたヒドロキシメチルホスホネートRNAを含むフラクションを集め、凍結乾燥する。残渣を1モル濃度テトラブチルアンモニウムフルオリドの脱水テトラヒドロフラン溶液で24時間処理する。0.05モル濃度のトリエチルアンモニウムアセテートバッファー(pH6.9)を加え、テトラヒドロフランを濃縮除去する。残渣をSep-Pak PLUS tC18で脱塩し、逆相HPLCで精製し、立体を制御したヒドロキシメチルホスホネートRNAを得る。
上記の方法で得られた、HCP若しくはCPGにオキザリルリンカーを介して結合したオリゴヌクレオシドHホスホネートを、四塩化炭素-1、4-ジオキサン(体積比4:1)の飽和アンモニア溶液に0℃で30分間処理し、1、4-ジオキサンで洗浄する。有機溶媒を集め、減圧下濃縮乾燥する。25%アンモニア水-エタノール溶液(体積比3:1)で希釈し、フラスコ内に密閉し、室温で12時間処理する。溶液を減圧下濃縮し、残渣を逆相HPLCで精製する。目的とする2'位がTBS基で保護されたホスホロアミデートRNAを含むフラクションを集め、凍結乾燥する。残渣を1モル濃度テトラブチルアンモニウムフルオリドの脱水テトラヒドロフラン溶液で24時間処理する。0.05モル濃度のトリエチルアンモニウムアセテートバッファー(pH6.9)を加え、テトラヒドロフランを濃縮除去する。残渣をSep-Pak PLUS tC18で脱塩し、逆相HPLCで精製し、立体を制御したホスホロアミデートRNAを得る。
上記の方法で得られた、HCP若しくはCPGにオキザリルリンカーを介して結合したオリゴヌクレオシドHホスホネートを、四塩化炭素-プロピルアミン(体積比9:1)溶液に室温で1時間処理し、メタノールで洗浄する。有機溶媒を集め、減圧下濃縮乾燥する。25%アンモニア水-エタノール溶液(体積比3:1)で希釈し、フラスコ内に密閉し、室温で12時間処理する。溶液を減圧下濃縮し、残渣を逆相HPLCで精製する。目的とする2'位がTBS基で保護されたN-プロピルホスホロアミデートRNAを含むフラクションを集め、凍結乾燥する。残渣を1モル濃度テトラブチルアンモニウムフルオリドの脱水テトラヒドロフラン溶液で24時間処理する。0.05モル濃度のトリエチルアンモニウムアセテートバッファー(pH6.9)を加え、テトラヒドロフランを濃縮除去する。残渣をSep-Pak PLUS tC18で脱塩し、逆相HPLCで精製し、立体を制御したN-プロピルホスホロアミデートRNAを得る。
上記の方法で得られた、HCP若しくはCPGにオキザリルリンカーを介して結合したオリゴヌクレオシドHホスホネートを、四塩化炭素-2-ジメチルアニモエチルアミン(体積比9:1)溶液に室温で1時間処理し、アセトニトリルで洗浄する。有機溶媒を集め、減圧下濃縮乾燥する。25%アンモニア水-エタノール溶液(体積比3:1)で希釈し、フラスコ内に密閉し、室温で12時間処理する。溶液を減圧下濃縮し、残渣を逆相HPLCで精製する。目的とする2'位がTBS基で保護されたN-[(2-ジメチルアミノ)エチル]ホスホロアミデートRNAを含むフラクションを集め、凍結乾燥する。残渣を1モル濃度テトラブチルアンモニウムフルオリドの脱水テトラヒドロフラン溶液で24時間処理する。0.05モル濃度のトリエチルアンモニウムアセテートバッファー(pH6.9)を加え、テトラヒドロフランを濃縮除去する。残渣をSep-Pak PLUS tC18で脱塩し、逆相HPLCで精製し、立体を制御したN-[(2-ジメチルアミノ)エチル]ホスホロアミデートRNAを得る。
(a)塩基除去型不斉補助基を用いるX-ホスホネートDNAの固相合成の基本手順(一般式 XI)
HCP若しくはCPGにサクシニルリンカー若しくはオキザリルリンカーを介して結合した5'-O-(DMTr)ヌクレオシド(0.5μmol)を合成に用いる。鎖長延長反応はTable1に記す工程を繰返し行なうことで達成する。鎖長延長後、不斉補助基は無水10%DBU/アセトニトリル溶液を用い室温15分で除去し、アセトニトリルで洗浄する。次に5'-O-DMTr基を3%ジクロロ酢酸/ジクロロメタン溶液で除去し、ジクロロメタンで洗浄する。HCP若しくはCPG上のオリゴマーをOリングの付いたスクリューキャップ式のエッペンドルフチューブに移す。0.5マイクロモルのオリゴヌクレオチドを含む固相担体を25%のアンモニア水(1mL)に懸濁させ、55℃で12時間処理し、核酸塩基部位の保護基を除去し、同時にHCP若しくはCPGからオリゴマーを遊離させる。遠心分離後、上清を丸底フラスコへ移し、固相担体を水(0.5mLで2回)で洗浄する。遠心分離後、集めた上清を減圧下乾燥する。残渣を水(1mL)で希釈し、Sep-Pak PLUS tC18にロードし、水で平衡化する。まず塩を除くために水(20mL)を流し、次に脱塩済みの立体を制御したXホスホネートDNAを50%アセトニトリル水溶液(10mL)で溶出させ、逆相UPLCとMALDI-TOF MSで分析する。
(a)酸除去型不斉補助基を用いるX-ホスホネートRNAの固相合成の基本手順(一般式 XI)
HCP若しくはCPGにサクシニルリンカー若しくはオキザリルリンカーを介して結合した5'-O-(DMTr)リボヌクレオシド(0.5μmol)を合成に用いる。鎖長延長反応はTable2に記す工程を繰返し行なうことで達成する。鎖長延長後、不斉補助基は無水10%DBU/アセトニトリル溶液を用い室温15分で除去し、アセトニトリルで洗浄する。次に5'-O-DMTr基を3%ジクロロ酢酸/ジクロロメタン溶液で除去し、ジクロロメタンで洗浄する。HCP若しくはCPG上のオリゴマーをOリングの付いたスクリューキャップ式のエッペンドルフチューブに移す。0.5マイクロモルのオリゴヌクレオチドを含む固相担体を25%のアンモニア水-エタノール混合液(体積比3:1、1mL)に懸濁させ、室温で48時間処理し、核酸塩基部位の保護基を除去し、同時にHCP若しくはCPGからオリゴマーを遊離させる。遠心分離後、上清を丸底フラスコへ移し、固相担体を水(0.5mLで2回)で洗浄する。遠心分離後、集めた上清を減圧下乾燥し、残渣を逆相HPLCで精製する。2'位をTBS基で保護したXホスホネートRNAを含むフラクションを集め、凍結乾燥する。残渣を1モル濃度テトラブチルアンモニウムフルオリドの脱水テトラヒドロフラン溶液を用い室温で24時間処理する。0.05モル濃度のトリエチルアンモニウムアセテートバッファー(pH6.9)を加え、テトラヒドロフランを濃縮除去する。残渣をSep-Pak PLUS tC18で脱塩し、逆相HPLCで精製し、立体を制御したXホスホネートRNAを得る。
Claims (16)
- 下記の一般式(I):
- R1及びR2が水素原子又はアルキル基であり、R3がフェニル基であり、R4及びR5が水素原子又はアルキル基であり、Yが-C(R6)(R7)-(R6及びR7はそれぞれ独立に水素原子又はアルキル基であり、R7がアルキル基を示す場合にはR7はR3が示すフェニル基と結合して環を形成していてもよい)、o-フェニレン基、又はナフタレン-1,2-ジイル基である請求項1に記載の化合物又はその塩。
- 核酸誘導体の製造方法であって、下記の工程:
(a)下記一般式(V):
で表される核酸誘導体と、上記一般式(IV)で表されるヌクレオチド誘導体(ただし、R1、R2、R3、R4、R5、及びYは上記と同義であり;R21は水酸基の保護基を示し;R22は水素原子、アルコキシ基、フッ素原子、又は保護された水酸基を示し;Bsは核酸塩基を示す)とを反応させて、上記一般式(III)(ただし、R1、R2、R3、R4、R5、Y、及びnは上記と同義であり;R11は水酸基の保護基を示し;R12、R13、及びR14はそれぞれ独立に水素原子、アルコキシ基、フッ素原子、又は保護された水酸基を示し;R15は必要に応じてリンカーを介して結合した固相担体を示し;Bsは核酸塩基を示す)で表される核酸誘導体を製造する工程;
(b)上記工程(a)により得られた一般式(III)で表される核酸誘導体からR11で表される水酸基の保護基を除去し、必要に応じて、得られた核酸誘導体と一般式(IV)で表されるヌクレオチド誘導体とを反応させる工程を繰り返す工程;
(c)酸性条件下において一般式(II)で表される不斉補助基を除去して下記一般式(VI):
(d)上記工程(c)で得られた核酸誘導体のリン原子を修飾した後、必要に応じて保護基を脱離する工程
を含む方法。 - 工程(c)における酸性条件として3% ジクロロ酢酸(DCA)/ジクロロメタンを用いる請求項7に記載の方法。
- リン原子の修飾として、Xで表される基(Xは置換基を有していてもよいアルキルチオ基、置換基を有していてもよいアルケニルチオ基、置換基を有していてもよいアルキニルチオ基、置換基を有していてもよいアリールチオ基、チオール基、置換基を有していてもよいアルコキシ基、-BH3、-Se-、置換基を有していてもよいアルキル基、置換基を有していてもよいアルケニル基、置換基を有していてもよいアルキニル基、置換基を有していてもよいアリール基、置換基を有していてもよいアシル基、又は-N(R116)(R117)(R116及びR117はそれぞれ独立に水素原子、置換基を有していてもよいアルキル基、置換基を有していてもよいアルケニル基、置換基を有していてもよいアルキニル基、又は置換基を有していてもよいアリール基を示す)で表される基を示す)をリン原子上に導入する請求項7又は8に記載の方法。
- 下記の一般式(XI):
- R101及びR102が水素原子又はアルキル基であり、R103がシアノ基であり、Zが-C(R104)(R105)-(R104及びR105は水素原子又はアルキル基である)である請求項10に記載の化合物又はその塩。
- R101及びR102が水素原子であり、R103がシアノ基であり、Zが-C(R104)(R105)-(R104及びR105は水素原子である)である請求項10に記載の化合物又はその塩。
- 核酸誘導体の製造方法であって、下記の工程:
(a)下記一般式(XIII'):
で表される核酸誘導体と、上記一般式(XIV)で表されるヌクレオチド誘導体(ただし、R121は水酸基の保護基を示し;R122は水素原子、アルコキシ基、フッ素原子、又は保護された水酸基を示す)とを反応させた後に、求電子剤を用いてX(Xはチオール基、-BH3、-Se-を示す)を導入し、R121が示す水酸基の保護基を除去することにより下記一般式(XV):
(b)上記工程(a)により得られた上記一般式(XV)で表される核酸誘導体から塩基性条件下において一般式(XII)で表される不斉補助基を除去して下記一般式(XVII):
を含む方法。
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JP2019006793A (ja) | 2019-01-17 |
JP2016128431A (ja) | 2016-07-14 |
JPWO2012039448A1 (ja) | 2014-02-03 |
JP6450692B2 (ja) | 2019-01-09 |
EP2620428B1 (en) | 2019-05-22 |
EP2620428A1 (en) | 2013-07-31 |
US20130178612A1 (en) | 2013-07-11 |
EP2620428A4 (en) | 2014-05-21 |
JP5868324B2 (ja) | 2016-02-24 |
US10428019B2 (en) | 2019-10-01 |
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